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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-11-13 23:47:36 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-11-13 23:47:36 +0000 |
commit | 80be5584846dc82a8a9270892fc58bb8d369ee40 (patch) | |
tree | d44c2153f01cb670bb81919b7a74e9092f16cf5e /nuttx/drivers/mmcsd | |
parent | c9c788a743c2abe94716f47272144bd7a777e651 (diff) | |
download | px4-nuttx-80be5584846dc82a8a9270892fc58bb8d369ee40.tar.gz px4-nuttx-80be5584846dc82a8a9270892fc58bb8d369ee40.tar.bz2 px4-nuttx-80be5584846dc82a8a9270892fc58bb8d369ee40.zip |
Need to use poll-waiting
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2254 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/drivers/mmcsd')
-rw-r--r-- | nuttx/drivers/mmcsd/mmcsd_sdio.c | 45 |
1 files changed, 39 insertions, 6 deletions
diff --git a/nuttx/drivers/mmcsd/mmcsd_sdio.c b/nuttx/drivers/mmcsd/mmcsd_sdio.c index ab8bbce7b..a38521fff 100644 --- a/nuttx/drivers/mmcsd/mmcsd_sdio.c +++ b/nuttx/drivers/mmcsd/mmcsd_sdio.c @@ -127,6 +127,10 @@ struct mmcsd_state_s * Private Function Prototypes ****************************************************************************/ +/* Command/response helpers *************************************************/ + +static int mmcsd_sendcmdpoll(struct mmcsd_state_s *priv, uint32 cmd, uint32 arg); + /* Transfer helpers *********************************************************/ static ssize_t mmcsd_doread(FAR void *dev, FAR ubyte *buffer, @@ -186,6 +190,36 @@ static const struct block_operations g_bops = ****************************************************************************/ /**************************************************************************** + * Command/Response Helpers + ****************************************************************************/ + +/**************************************************************************** + * Name: mmcsd_sendcmdpoll + * + * Description: + * send a command and poll-wait for the response. + * + ****************************************************************************/ + +static int mmcsd_sendcmdpoll(struct mmcsd_state_s *priv, uint32 cmd, uint32 arg) +{ + int ret; + + /* Send the command */ + + SDIO_SENDCMD(priv->dev, cmd, arg); + + /* Then poll-wait until the response is available */ + + ret = SDIO_WAITRESPONSE(priv->dev, cmd); + if (ret != OK) + { + fdbg("ERROR: Wait for response to cmd=%08x failed: %d\n", cmd, ret); + } + return ret; +} + +/**************************************************************************** * Transfer Helpers ****************************************************************************/ /**************************************************************************** @@ -516,9 +550,8 @@ static inline int mmcsd_cardidentify(struct mmcsd_state_s *priv) /* Then send CMD0 (twice just to be sure) */ - SDIO_SENDCMD(priv->dev, MMCSD_CMD0, 0); - SDIO_WAITRESPONSE(priv->dev, MMCSD_CMD0); - SDIO_SENDCMD(priv->dev, MMCSD_CMD0, 0); + mmcsd_sendcmdpoll(priv, MMCSD_CMD0, 0); + mmcsd_sendcmdpoll(priv, MMCSD_CMD0, 0); up_udelay(MMCSD_IDLE_DELAY); /* Check for SDHC Version 2.x. Send CMD8 to verify SD card interface @@ -530,7 +563,7 @@ static inline int mmcsd_cardidentify(struct mmcsd_state_s *priv) * CMD8 Response: R7 */
- SDIO_SENDCMD(priv->dev, SD_CMD8, MMCSD_CMD8CHECKPATTERN|MMCSD_CMD8VOLTAGE_27);
+ mmcsd_sendcmdpoll(priv, SD_CMD8, MMCSD_CMD8CHECKPATTERN|MMCSD_CMD8VOLTAGE_27);
ret = SDIO_RECVR7(priv->dev, SD_CMD8, &response);
if (ret == OK)
{ @@ -564,7 +597,7 @@ static inline int mmcsd_cardidentify(struct mmcsd_state_s *priv) { /* Send CMD55 */ - SDIO_SENDCMD(priv->dev, SD_CMD55, 0);
+ mmcsd_sendcmdpoll(priv, SD_CMD55, 0);
ret = SDIO_RECVR1(priv->dev, SD_CMD55, &response); if (ret != OK) { @@ -602,7 +635,7 @@ static inline int mmcsd_cardidentify(struct mmcsd_state_s *priv) /* Send ACMD41 */ - SDIO_SENDCMD(priv->dev, SD_ACMD41, MMCD_ACMD41_VOLTAGEWINDOW|sdcapacity); + mmcsd_sendcmdpoll(priv, SD_ACMD41, MMCD_ACMD41_VOLTAGEWINDOW|sdcapacity); ret = SDIO_RECVR3(priv->dev, SD_CMD55, &response); if (ret != OK) { |